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Unit 2 Review. Take out pencil & paper You must record all the problems and their solutions. 123,400,567,895,321.892. Which digit is in each place: Ten Millions ____ Hundred Billions ____ Thousands____ Thousandths____. ANSWER: 123,400,567,895,321.892. Which digit is in each place:

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## Unit 2 Review

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**Unit 2 Review**Take out pencil & paper You must record all the problems and their solutions.**123,400,567,895,321.892**• Which digit is in each place: • Ten Millions ____ • Hundred Billions ____ • Thousands____ • Thousandths____**ANSWER:123,400,567,895,321.892**• Which digit is in each place: • Ten Millions __6__ • Hundred Billions __4__ • Thousands__5__ • Thousandths__2__**Write as a power of ten**• 0.000001 • ANSWER: 10-6**Which is greater, 52 or 25?**Explain. ANSWER: 5 * 5 = 25 2*2*2*2*2 = 32**Divide**• 5255/25 ANSWER: 2101 • 5**Write as a power of ten**• 1 • 100 • ANSWER: 1 = 10 -2 • 10 * 10**Write as a power of ten**1 million • ANSWER: 106 • (1,000,000)**Multiply**• 23.2 * 7.5 ANSWER: 174.00**Change to Standard Notation**• 8.9 * 107 • ANSWER: 89,000,000**Change to Scientific Notation**• 118 trillion • ANSWER: 1.18 * 10 14 • (118,000,000,000,000.)**Solve**89.5 * .0001 ANSWER: .00895 (89.5 * 10 -4)**Solve**.56 * 10,000 ANSWER: 5,600. (.56 * 10 4)**Write in standard notation.**Seven hundred two and seventy-nine thousandths ANSWER: 702.079**Change to Scientific Notation**• 34,000 • ANSWER: 3.4 * 104**How can you check your answer to the following problems:**• Addition and Subtraction • Multiplication and Division**Subtract**• 6.80 – 5.43 ANSWER: 1.37**Add**• 35.1 + 4.98 ANSWER: 40.08**CompareUse >,<, or =**• 9 hundredths_ 0.09 • ANSWER: • 9 hundredths = 0.09**Write in Words**• 0.089 • ANSWER: Eighty-nine thousandths**Write in Number-Word Notation**• 10,400,000 • ANSWER: 10.4 Million**Change to Standard Notation**• 5.6 billion • ANSWER: 5,600,000,000**CompareUse >,<, or =**• 34 ______2.3 * 104 • ANSWER: • 34 < 2.3 * 104**Write as a power of ten**• 1 hundred billion • ANSWER: 10 11 • (100,000,000,000)**Write as a power of ten**• 10,000,000,000 • ANSWER: 1010**CompareUse >,<, or =**• .0001____ .00001 • ANSWER: • .0001> .00001**Change to Standard Notation**• 5.5 * 10-6 • ANSWER: .0000055**Change to Standard Notation**• 1.25 * 106 • ANSWER: 1,250,000**Change to Scientific Notation**• 67,500,000 • ANSWER: 6.75 * 107**CompareUse >,<, or =**• 5.9 million____5.9 * 106 • ANSWER: • 5.9 million= 5.9 * 106

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